التفاصيل البيبلوغرافية
| العنوان: |
The FastEddy® Resident‐GPU Accelerated Large‐Eddy Simulation Framework: Moist Dynamics Extension, Validation and Sensitivities of Modeling Non‐Precipitating Shallow Cumulus Clouds. |
| المؤلفون: |
Muñoz‐Esparza, Domingo, Sauer, Jeremy A., Jensen, Anders A., Xue, Lulin, Grabowski, Wojciech W. |
| المصدر: |
Journal of Advances in Modeling Earth Systems; Apr2022, Vol. 14 Issue 4, p1-22, 22p |
| مصطلحات موضوعية: |
CUMULUS clouds, STRATOCUMULUS clouds, ATMOSPHERIC models, MODEL validation, MICROPHYSICS, ADVECTION, TURBULENCE |
| مستخلص: |
Herein we describe the moist dynamics formulation implemented within the graphics processing unit‐resident large‐eddy simulation FastEddy® model, which includes a simple saturation adjustment scheme for condensation and evaporation processes. Two LES model intercomparison exercises for non‐precipitating shallow cumulus clouds are simulated in order to validate this model extension, including a static forcing and a time‐dependent forcing case. Overall, we find our dynamical, thermodynamical and microphysical quantities, along with turbulence variability and fluxes, to be commensurate with the corresponding model intercomparison results. In addition, sensitivities to specific model settings are investigated. Among these settings, it is shown that boundary layer and cloud layer structure and characteristics are sensitive to use of higher‐order advection schemes impacting the vertical distribution of cloud content and associated turbulence statistics. Increasing the timescale of the saturation scheme leads to enhanced liquid water presence and decreases vertical velocity variance within the cloud deck. In some cases, these sensitivities agree with the model‐to‐model variability reported in the intercomparison exercises, highlighting the important role of specific model implementation choices in the context of shallow cumulus convection simulations. These analyses and findings also provide the basis for future extensions and applications of FastEddy® for modeling moist convection and precipitation scenarios. Plain Language Summary: The purpose of this study is to report on the extension of the FastEddy® model to incorporate moist processes and non‐precipitating clouds. Exercising two different shallow cumulus clouds scenarios used as benchmark for turbulence‐resolving atmospheric models in the literature, we demonstrate that our results are commensurate with these model inter‐comparison exercises. We document the sensitivities of the simulated cloud characteristics to particular choices in the model settings, and show how an accelerated model can be used to understand these model sensitivities critical to quantify the uncertainty in simulating shallow cumulus clouds. Key Points: The FastEddy® model is extended to include moist dynamics processes alongside a simple scheme for condensation/evaporationResults on two non‐precipitating shallow cumulus cloud scenarios demonstrate overall behavior that is commensurate with existing modelsSensitivities in simulated shallow cumulus convection to model dynamics and microphysics parameterization are characterized [ABSTRACT FROM AUTHOR] |
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